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Optimizing the external energy input into farmland ecosystems: a case study from Ningxia, China

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  • Ma, Z. Y.
  • Edwards-Jones, G.

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  • Ma, Z. Y. & Edwards-Jones, G., 1997. "Optimizing the external energy input into farmland ecosystems: a case study from Ningxia, China," Agricultural Systems, Elsevier, vol. 53(2-3), pages 269-283.
    • Handle: RePEc:eee:agisys:v:53:y:1997:i:2-3:p:269-283
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    References listed on IDEAS

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    1. Jones, M. R., 1989. "Analysis of the use of energy in agriculture--Approaches and problems," Agricultural Systems, Elsevier, vol. 29(4), pages 339-355.
    2. Patnaik, Suprava & Ramakrishnan, P. S., 1989. "Comparative study of energy flow through village ecosystems of two co-existing communities (the Khasis and the Nepalis) of Meghalaya in north-east India," Agricultural Systems, Elsevier, vol. 30(3), pages 245-267.
    3. Panesar, Balwinder S. & Fluck, Richard C., 1993. "Energy productivity of a production system: Analysis and measurement," Agricultural Systems, Elsevier, vol. 43(4), pages 415-437.
    4. de Wit, C. T., 1992. "Resource use efficiency in agriculture," Agricultural Systems, Elsevier, vol. 40(1-3), pages 125-151.
    5. Bonny, Sylvie, 1993. "Is agriculture using more and more energy? A French case study," Agricultural Systems, Elsevier, vol. 43(1), pages 51-66.
    6. Fluck, Richard C., 1979. "Energy productivity: A measure of energy utilisation in agricultural systems," Agricultural Systems, Elsevier, vol. 4(1), pages 29-37, January.
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    1. Edwards-Jones, G. & Howells, O., 2001. "The origin and hazard of inputs to crop protection in organic farming systems: are they sustainable?," Agricultural Systems, Elsevier, vol. 67(1), pages 31-47, January.

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